Example 8.39: calculating Cramer’s V
Cramer's V is a measure of association for nominal variables. Effectively it is the Pearson chi-square statistic rescaled to have values between 0 and 1, as follows:V = sqrt(X^2 / [nobs * (min(ncols, nrows) - 1)])where X^2 is the Pearson chi-square, n...
